Signaling instrument of power vehicles



Oct. 5 1926.

1,602,114 A. KAZENMAIER ET AL SIGNALING INSTRUMENT OF POWER VEHICLES Filed July 3, 1922 e ft m Patented Get. 5, 1926.

UNITED STAT-ES PATENT OFFICE. I

AUGUST KAZENMAIER AND WALTER HAEHNLE, OF STUTTG 'ART, GERMANY, .AS-- SIGNORS TO ROBERT BOSCH AKTIENGESELLSCHAFT, 0F STUTTGART,'GERMANY.

- SIGNALING INSTRUMENT OF POWER VEHICLES.

Application filed J'u1y 3 1922, Serial No.

It has been detected that certain impurities, irregularities, and weakenings of the sounds. produced by signaling instruments of power vehicles are due to therigid connection of the instrument with the vehicle. The present invention eliminates the disadvantages of such a connection by inserting aresilient connection between the fastening place for the instrument and the sound producing means proper, said resilient connection keeping the vibrations and shocks resulting from the operation of the motor or the running of the vehicle off the soundproducing means, and preventing the vibratory energy of these means from being at least partly absorbed by the vehicle.

The form of construction of the resilient connecting means and the arrangement of the same at the vehicle may vary in wide limits. In one desirable form of construction, the sound-producer may rigidly be built into its enclosing casing and an elastic connection, such as a spring or other resilient means may be inserted into the connection between the casing and the vehicle. Such elastic connection is, preferably, so arranged that the direction of resilience is parallel, or substantially parallel, to the direction of motionof the sound waves.

Our invention is illustrated by way of example, in the accompanying drawing, in which Fig. l is a View, partly in side elevation and partly in vertical section, of a signaling instrument constructed and arranged in conformity with this invention. Fig. 2 is a horizontal section in line AB of Fig. 1.

Referring to Figs. 1 and 2, the sound-producer proper is enclosed in a casing a provided in known manner with a mouth piece I). The supporting member a for the sound producer is rigidly afiixed to the vehicle, but

- the supporting proper is effected by the mediation of a resilient member (13 formed, in the example shown, of a plurality of flat springs which are connected on the one side with the support 0 and on the other side with the clip e of the sound-producer.

In the sectionalized part of the view, Fig. 1, the sound-producing parts, together with the driving parts therefor are shown-as combined upon a base plate'z' which is inserted into the casing a. The vibratory sound producing means in the form of a membrane or diaphragm is indicated at k, with its 572.669, and in Germany July 30, 1921.

peripheral edge portions mounted in the rigid ring-member Z. Another supporting ring-member on may be, and is shown as, used. By the form of construction shown in the concrete embodiment here chosen to illustrate the invention, the'resilient connection is located outside of the casing of the sound producer and the sound producer is ri idly built into its enclosing casing.

iaving now described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. A support for an acoustic signaling instrument having a sound-producing membrane, comprising, in combination, a bracket, a holding device for the signaling instrument, resilient supporting means arranged between and connecting the said bracketand the said holding device in such manner that the resilient movement of said means is directed substantially perpendicularly to the plane of the sound producing membrane located in the signaling instrument, movement of said resilient means being unrestrained. I

2. A support for an acoustic signaling instrument having a sound-producing membrane, comprising, in combination, a bracket, a holding device for the signaling instrument, a spring arranged between and con.- necting the said bracket and the said holding device in such a manner that the resilient movement, of said spring is directed substantially perpendicularly to the plane of the sound producing membrane located in the signaling instrument, movement of said sprin being unrestrained.

3. 3 support for an acoustic signaling instrument, said signaling instrument having a sound producing membrane, comprising, in combination, a bracket, a holding device for the signaling instrument, and a plurality of superposed springs arranged between and connecting said bracket and said holding device in such a manner that the resilient movement of said springs is directed substantially perpendicularly to the membrane of the signaling instrument, movement of I said springsbeing unrestrained.

4. A support for an acoustic signaling instrument, said signaling instrument having a sound producing membrane, comprising, in combination, a bracket, a holding device for the signaling instrument, and a bundle of flat springs, one end of said bundle of springs being fastened to the said bracket and the other end being connected to the said holding device, the resilient movement of said springs being directed substantially perpendicularly to the membrane of the signaling: instrument, movement of said springs being unrestrained.

The combination, with an acoustic signaling instrument including vibratory sound producing means, of resilent means, yieldable in a line substantially parallel to the direction of movement of said sound producing means. for supporting said instrument so that the vibrations of the sound producing means' will not be damped sufficiently to materially impair the normal tone of the instrument.

6. The combination. with an acoustic signalin; instrument including vibratory sound producing means, and a base to which said lnstrument is to be connected, of resilient means connected to said base and to said instrument for supporting said instrument, such supporting means substantially preventing a material amount of the vibratory energy of said sound producing means from being transferred to said base.

7. The combination, with an acoustic sig naling instrument including vibratory sound producing means, of means, mounted for oscillatory movement in a direction parallel with the vibratory movement of said soundproducing means and oscillating therewith in the operation of said instrument, for supporting said instrument so that the vibrations of the sound-producing means Will not be damped sufliciently to materially impair the normal tone of the instrument.

In testimony whereof we have affixed our signatures.

AUGUST KAZENMAIER. [1,. s.] \VALTER HAEHNLE. [11.43.] 

